Protection Control
SiUS34-801A_b
66
VRVIII R-410A Heat Pump 60Hz
[In heating operation]
For multi-outdoor-unit systems, the entire system performs this control in the following
sequence.
*1:
Pe_min
represents a minimum low pressure value detected within the system.
*2: For compressor steps, refer to information on page 45.
&
&
&
N
ormal operation
Pe_min<24.65psi
(See *1)
Pe_min
>39.15psi
Pe_min
<24.65psi
• Pe_min>29psi
• A lapse of 15 sec.
• Pe_min<24.65psi
• A lapse of 10 sec.
Pe_min<1
8
.
8
5psi
Pe<10.15psi
Restart stand
b
y
(
u
p to 3 times
w
ithin a
period of 60 min.)
Stop d
u
e to malf
u
nction
[
E4
] is displayed.)
Restart stand
b
y
occ
u
rs fo
u
r times
w
ithin a
period of 60 min.
Compressor system (See *2):
1-step
u
p per 15 sec.
Compressor system (See *2):
2-step
u
p per 15 sec.
Compressor system (See *2):
Step 1
Compressor system (See *2):
2-step do
w
n per 10 sec.
• Pe_min>33.35psi
• Compressor step=M
Summary of Contents for VRV III
Page 15: ...SiUS34 801A_b xiv ...
Page 23: ...Model Selection SiUS34 801A_b 8 General Information ...
Page 133: ...Field Settings SiUS34 801A_b 118 VRVIII R 410A Heat Pump 60Hz ...
Page 254: ...SiUS34 801A_b Test Operation VRVIII R 410A Heat Recovery 60Hz 239 R 410A Label R 410A Label ...
Page 329: ...Field Setting SiUS34 801A_b 314 Indoor Unit ...
Page 340: ...SiUS34 801A_b Troubleshooting by Remote Controller Troubleshooting 325 ...
Page 490: ...SiUS34 801A_b Piping Diagrams Appendix 475 Heat Pump 230V RXYQ72 96 120PTJU 3D058636A ...
Page 491: ...Piping Diagrams SiUS34 801A_b 476 Appendix Heat Pump 230V RXYQ144PTJU 3D058640 ...
Page 492: ...SiUS34 801A_b Piping Diagrams Appendix 477 Heat Recovery 460V REYQ72 96 120PYDN 3D058639A ...
Page 493: ...Piping Diagrams SiUS34 801A_b 478 Appendix Heat Recovery 460V REMQ72PYDN 3D058637A ...
Page 494: ...SiUS34 801A_b Piping Diagrams Appendix 479 Heat Recovery 460V REMQ96 120PYDN 3D058638A ...
Page 495: ...Piping Diagrams SiUS34 801A_b 480 Appendix Heat Recovery 230V REYQ72 96 120PTJU 3D058639A ...
Page 496: ...SiUS34 801A_b Piping Diagrams Appendix 481 Heat Recovery 230V REYQ144PTJU 3D058640 ...
Page 497: ...Piping Diagrams SiUS34 801A_b 482 Appendix Heat Recovery 230V REMQ72PTJU 3D058637A ...
Page 498: ...SiUS34 801A_b Piping Diagrams Appendix 483 Heat Recovery 230V REMQ96 120PTJU 3D058638A ...
Page 501: ...Piping Diagrams SiUS34 801A_b 486 Appendix 1 3 BS Unit 4D057985A ...
Page 537: ...Piping Installation Point SiUS34 801A_b 522 Appendix ...
Page 543: ...Pressure Sensor SiUS34 801A_b 528 Appendix ...
Page 563: ...SiUS34 801A_b iv Index ...